To:
Subject: "SR" Ring Grooves

Question:

We manufacture RTJ gaskets and have been asked to supply octagonal gaskets in SR shape. We have manufactured SRX and SBX gaskets in the past but have never manufactured SR gaskets. Are you aware of SR gaskets and where we can learn about them?

Answer:

"SR" refers to a specific ring groove type and dimension set, not a ring gasket. SR ring grooves accept standard RX or SRX* gaskets. These ring grooves only appear in API Spec 16A, where you can find their dimensions with tolerance. The following table lists the API Spec 16A Clamp Hub connectors with SR ring grooves (2005).

To positively identify any connector of this type encountered in the field, you may wish to record the dimensions on the Worksheet you can find at http://www.woodcousa.com/catalogs/clamp14.htm, and compare the dimensions recorded to those on the Slide Rule at http://www.woodcousa.com/hubs/hubslide.htm.

Some persons refer to SR ring grooves as "Deep Ring Grooves." These ring groove dimensions allow the connector faces to meet when made-up using an RX or SRX ring gasket. At WOODCO USA we have never cut an SR ring groove in a flange, but we have heard of this. Any flange that has this ring groove must also have additional thickness and a raised face similar to a BX flange in order to function reliably.

WOODCO USA recommends the use of SRX gaskets when making-up these connections underwater.

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